Artificial denture.



r F. L. MURDOCK.

ARTIFICIAL DENTURE.

APPLiCATlON FILED lUNE I, ma.

Patented Aug. 27, 1918.

ARTIFICIAL nnivrunn.

Specification of Letters Patent.

Application filed June 7, 1918. Serial No; 238,651.

To all whom it may concern:

Be it known that I, FREDERICK L. MUR- DOCK, a citizen of the United States, residing at Meriden, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Artificial Dentures; and I do hereby declare the following, when taken in connection with the accompanyingdrawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1 a view partly in section of a tooth root having my improved sheath mounted therein and shown in connection with a standard crown or facing.

Fig. 2 a similar view showing my im proved sheath in connection with a root having a standard cap and the crown or facing with a metallic base.

Fig.3 a similar view showing a root provided with a standard cap with my improved sheath connected therewith in connection with a crown like that shown in Fig. 1.

Fig. 4 a side view of my improved sheath,

detached. p

Fig. 5 a front view illustrating the application of my invention to bridge work.

This invention relates to an improvement in artificial denture, the object being to pro vide means for connecting crown or bridge work to roots of teeth in such a way that the artificial teeth may be readily removedby the wearer for the purpose of cleaning or to permit of ready treatment of the roots should occasion require without cutting away the crown or facing, or breaking the foundation for the post of a standard porcelain top or facing; and the invention con sists in. the construction hereinafter; described and particularly recited in the claims' I In carryingout my invention I employ. a sheath 7 formed from gold or suitable material and' adapted to be inserted into a tooth root 8. This sheath is formed at its upper end with a flange 9 and its lower end 10 is open. Preferably and as herein shown the sheath will be formed with a swell or en-' 'largement near its upper end for the better engagement of the prongs 11 and-12 forming Patented Aug. 27,1918.

sTA'rns mam omen 7 the post of a standard porcelain crown 13 whichis usually provided in its under face 7 with a recess 15 which gives clearance for the'flange 9 which stands above the'upper edge of the root 8. Before the sheath is insorted into a tooth, a plug 16 of gutta percha or other suitable material will be inserted into the bottom of the cavity and so as to ing plate 17 is placed over the top of the root 8, and instead of forming the tube integral with this cap Iform the cap with a con tral opening 18 through which the sheath may be inserted so that the flange 9 rests upon the upper edge of the cap, and if the porcelain crown 19 has a metal base 20 this base will be recessed to give clearance for the flange or a porcelain crown 13v as shown in Figs. 1 and 3 of the drawings, may be used in connection with a cap or crown 17. In either case thesheath forms a bearing for the crown and assists in holding the crown in position. In bridge work and as indicatedin 5 of thedrawings, two anchor roots 21 and 22will have the sheaths mounted in them and so that if the end facings 28 and 2a are provided with pins these pins may be inserted into the anchor teeth and the intermediate teeth-25 will be securely held in position and the entire bridge removed by the wearer when desired for, cleansing.

It will thus be seen that with my im proved sheath, any of the standard crowns crowns are provided.

I claim 1 annular flange.

2; Thecombination with a prepared root In many cases and as indicated in 1. Asheath for artificial denture compris ing a tubular portion expanded near its up per end and formed at its upper end with an formed With a cavity and provided with a specification in the presence of two subscribcaphfqrmed Withfa cintrzfll openiizlg 1iln line ing Witnesses. Wit tie cavity 0 a 5 eat inserte t rou h said opening, said sheath formed With a, MU Q 5 flange iejsting upon the uppei" face ofsziid Vyitnessesz cap. HARRY H. HOLT, In testimony hFQQf m? s nedfihi a G BQE:

Copies of this patent may be obtained fgy fi ve ce its acp byedd 1'essing the Commissioner of Patents,

- Wshihgtoh, n; c." 

